Lamp shade



April 23, 1935." w. T. PARTRIDGE LAMP SXHADE Filed May 25, 1952 Patented Apr. 23, 1935 UNITE STATES PATEN OFFIGE LAMP SHADE 10 Claims.

The present invention relates to a lamp shade and more particularly, a lamp shade which may be readily arranged to provide a number of different ornamental effects.

Lamp shades of present day manufacture usually have a single surface with a fixed design applied thereto which cannot be changed by the purchaser to suit his individual tastes or requirements. Very often it becomes desirable to 10 slightly change the color of the lighting effects in a room, particularly when some change is made in the arrangement of the other furnishings of the room, and in order to completely accomplish this result, it is usually necessary to purchase i new lamp shades. Also, lamp shades having a fixed design thereon do not generally harmonize with the furnishings of different rooms and, therefore, may not be moved from the room for which they were particularly purchased.

The principal object of my invention is to provide a lamp shade which willproduce a number of distinctly unusual and novel lighting effects.

A further object of my invention is to provide a lamp shade which may be readily changed to harmonize with diiierent settings.

Another object of the invention is to provide a lamp shade which may be varied to produce different designs and which can be made from A a previously formulated general design and color scheme by one not necessarily highly-skilled in the decorative arts.

Still another object of the invention is to provide a lamp shade formed of units which may be interchangeably assembled by the purchaser to provide a design and color to suit his particular tastes.

In the drawing,

Figure 1 is a side elevation of a lamp provided with a lamp shade of my invention, with a portion of the lamp shade broken away;

Figure 2 is a central vertical section through a portion or the lamp shade;

Figure 3 is a horizontal section of the lamp shade shown in Figures 1 and 2;

Figure 4 is a horizontal section through a modified form of my lamp shade;

Figure 5 is a vertical section through a modified form of my lamp shade, taken on the l ne 55 of Figure 6; and

Figure G-is fragmentary side elevation of the lamp shade illustrated in Figure 5.

I-teferring to the form of my invention illustrated in Figures 1, 2, and 3, the numeral l!) designates a lamp base of any well known type which supports lam-p bulb H at its upper end,

the lamp bulb preferably having the usual substantially circular and horizontally disposed filament therein as indicated at i2. A lamp shade support i3 is secured upon the lamp bulb II, but it will be understood that a lamp shade support of any suitable type may be substituted therefor. a

l The lamp shade comprises inner and outer members M and i5 respectively, each of which preferably has the form of a truncated cone. The 10 wall of the outer member i5 is less sharply conical or angled with respect to a vertical line than the wall of the inner member i l and is provided with vertically extending plaits or corrugations it of any desired cross-section, the depth of these plaits increasing from the'upper portion I! of the outer member I5 to the lower portion l8 thereof. The inner member M may be formed of anytransparent material which has sufiicient rigidity, but I find it desirable to form this memher from a transparent sheet material which can be bent or formed to the desired shape. The outer member 6 5 is preferably formed of a translucent material, the type of parchment paper generally used for lamp shades being particularly suited for this purpose. The outer member I 5 is supported upon the inner member it, the inner apioes Q9 of the plaits H3 resting directly upon the outer surface of the inner member i i.

In order to create a design upon the outer memher I 5,1 preferably apply transparent coloring materials over varying areas of the inner surface of the member HE. A number of such design areas are indicated on the drawing by the numerals 2G,

2!, 22, and 23. It will be understood that these areas may be positioned upon any portion of the surface of the inner member Hi but the areas diagrammatically illustrated on the drawing will serve to illustrate the design effect which may be obtained by the use of my lamp shade. The 40 upper design areas it and 2!, being closely adjacent the lamp filament l 2, will cause very slightly enlarged projected design areas 24 and 25, respectively, t0 appear'upon the outer member l5, these projected areas 24 and 25 also being only slightly larger than the original design areas 20 and 2! because of the fact that the members I4 and iii are relatively close together at this point. The fact that the design areas 25 and 2! are substantially at right angles to the path or" the light rayswill cause the edges of the projected design areas 24 and 25 to be sharp and distinct. The design areas 22 and 23 being more distant from the lamp filament l2 and being arranged at a sharper angle with respect to the path of the light rays emanating from the filament, will cause relatively larger projected areas 25 and 2? to appear upon the surface of the outer member i5. When, as is preferable, a lamp bulb having a substantially circular and horizontally disposed filament I2 is used, a penumbra eiiect 28 will appear at the edges of the projected design areas 25 and 21, causing these areas to be increasingly softened and producing unexpected and artistic efiects.

lhe outer member l5being plaited, the designs projected thereon will be enlarged in a horizontal plane as shown in Figure 3 and will appear at various angles with respect to the horizontal andthis effect, together with the eiiect resulting from the difference in the conical inclinations of the surfaces Hi and !5, will cause the entire design projected upon the outer member 15 to have characteristics entirely different from that of the. de-

sign which is applied to the inner member 14 and very simple design areas upon the inner member M: will cause unusual and unique designs to be projected upon the member l5. The design applied to individual inner members i need not be executed with a great amount of care, although, it is, of course, important to have the design areas, and particularly the color schemes, used for a group of generally similar lamp shades, formulated by one skilled in design work.

Figured illustrates a modification of my inventionwherein two inner members 25 and 33 are 32 and 33 upon the inner members 2Q and will have different color schemes and/or will be of different shapes and sizes, the light rays passing therethrough will be vari-colored and different arrangements of the inner members 29 and as with respect to each other will cause changes in the color and shape of the projected design areas upon the outer member 3 l Figures 5 and 6 of the drawing illustrate another modification of my invention wherein the plaitingsare omitted from the outer member. In the device of Figures 5 and 6, I preferably apply a suitable illustrative design to the interior of the inner member 34, and the shadow of this design is projected upon the outer member 35. As illustrated in Figure 5, the design shows a ship upon a body of water. The illustration of the ship being upon the upper portion of the inner member 3 1,

the shadow 36 thereof will be cast upon the upper portion 3? or" the outer member and since this portion of the outer member 35 is relatively close to the upper portion of the inner member 35, the image 35 will have a clear and distinct outline for the reasons stated in connection with the Figure 1 form of the invention. However, the remainder of the original design, i. e., the shadow of the ship and the lines indicating a body of water, will be projected upon the lower portion of the outer member 35. Since this portion is more widely spaced from the inner member 34 and since the light rays casting this shadow act at a sharper angle, the resulting image thereof projected on the outer member 35 will be in the form of soft shadows having indistinctly defined edges. This eiiect will be heightened when a parchment having a softly mottled texture is used for the outer member t will be understood that color effects may be used with the form of my lamp shade shown in Figures 5 and 6 as well as in the forms shown in Figures 1 to 4.

While a transparent material is preferred for use in the inner member or members of my lamp shade, translucent materials may be used. It will also be understood that the lamp shade members need not be frusto-conical.

I, claim:

1. A lamp shade comprising an inner transparent member bearing a design thereon and a corrugated member surrounding the first member and serving as a screen upon which the design of the inner member is projected.

2. A lampshade comprising an inner transparent member bearing a design thereon and a corrugated translucent member surrounding. and spaced'i'rom the inner member and serving as a screen upon which the design of the inner memher is projected.

3. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner member bearing a design thereon and an outer member serving as a screen upon which the design of the inner member may be projected, said members being arranged in a plane non-parallel to the axis of the source of light and at an angle with respect to each other.

i. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner circular member bearing a design thereon and an outer circular member serving as a screen upon which the design of the inner member may be projected, said members being arranged in a plane non-parallel to the axis of the source and at an angle with respect to each other.

5. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner member bearing a design thereon and an outer member servingas a screen upon which the design of the inner member may be projected, one of said members being corrugated.

6. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner member bearing a design thereon and an outer member serving as a screen upon which the design of the inner member may be projected, the outer member being corrugated.

7. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner circular member surrounding the source of light and bearing a design thereon and an outer circular member surrounding the first member and serving as a screen upon which the design of the inner member may be projected, one of said members being corrugated.

8. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner circular member surrounding the source of light and bearing a design thereon and an outer circular member surrounding the first member and serving as a screen upon which the design of the inner member may be projected, the outer member being corrugated.

9. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner circular member bearing a design thereon and an outer circular member serving as a screen upon which the design of the inner member may be projected, said members being arranged in a plane non-parallel to the axis of the source of light and at an angle with respect to each other, one of said members being corrugated.

10. A lamp shade adapted to be used with a source of light, said lamp shade comprising an inner circular member bearing a design thereon and an outer circular member serving as a screen upon which the design of the inner member may be projected, said members being arranged in a plane non-parallel to the axis of the source of light and at an angle with respect to each other, one of said members being corrugated.

WILLIAM T. PARTRIDGE. 

